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by sherifhanna
2889 days ago
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Against a pre-authorized list of networks, identified by their PLMN (public land mobile network) IDs stored in the SIM card, and cryptographic keys that the network uses to prove that it really is the network that's authorized in the SIM card. There are two network functions inside the core 4G network responsible for authenticating users, checking what services they're authorized to access, and handling them as they move across towers or roam into/out of range of the network. More here: http://www.3gpp.org/technologies/keywords-acronyms/100-the-e... |
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